smyth



(Model.) 7 2 Sheets-Sheet 1.

D. M. SMYTH.

BOOK SEWING MACHINE.

Patented Aug. 8, 1882.

gModel.) Y 2 Sheets-Sheet 2.

' D. M. SMYTH.

1 BOOK SEWING MACHINE. No. 262,326. Patented Aug. 8, 1882.

NITED STATES PATENT ()FFICE.

DAVID MOCONNEL SMYTH, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE SMYTHMANUFACTURING COMPANY, OF SAME PLACE.

BOOK-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 262,326, dated August8, 1882.

Application filed May 16, 1881. (Model.)

To all whom it may concern:

Be it known that I, DAVID MoOoNNEL SMYTH, of Hartford, in the State ofConnecticut, have invented an Improvement in Book- Sewing Machines, ofwhich the following is a specification.

This invention is an improvement upon the machine for which LettersPatent No. 220,312 were granted to me, and a reference is hereby made tothe same, by which to more fully understand the construction andoperation of the present devices.

My present invention relates to improvements in the means forfeeding thefolded sheets I 5 of paper to the sewing-machine, so that the machinemay be run with greater rapidity than it could be when fed by hand inthe manner contemplated by my aforesaid patent.

In the drawings, Figure 1 is a plan of the feed-table and of therevolving and verticallymoving arms 6, that form the sheet-holders. Fig.2 is an elevation of the sheet-holding fingers and feed-table. Fig. 3 isa section at the line a: a: of Fig. 1; and Fig. 4. is a section similarto Fig. 3, and an elevation of the sewingneedles and sheet-holderssimilar to those represented in my said Patent No. 220,312.

The feed-table a is supported above the revolving sheet-holding arms 6of the said patout, and preferably at the frontpart of the machine atthe left of the needles, and with its right-hand edge adjacent to thearm 6, that will next move to the position for the sheet to be sewed.

The needles 1 on the shafts k are similarto those on the aforesaidpatent, and they do not need further description. The arms 0 are groovedon their upper edge for the passage of the half-circle needles,andthevertical shaft 4 C, that carries the arm 6, has a vertical movementgiven to it at the proper time, as well as the progressive movement tocarry the sheet around to the place where it is sewed.

The table a has sides a, between which the folded sheets are packed withthe back folds upwardly, and the operator takes the last sheet and hangsit upon the fingers 00, immediately over the sheet-holding arm 0. Thefingers slightly open the sheet, and as the arm 0 israised-simultaneous] y with the other arms by the vertical movementgiven to the shaft C the arm e passes into the folded sheet, and thefingers c c are drawn back and the folded sheet drops upon the arm 6 inits proper position, and while the arm is descending again, and thenmoving away, carrying the sheet to be sewed, the operator is placinganother sheet on the fingers o c. This gives much more time foradjusting the sheet thanisgivenin the machine patented as aforesaidduring the brief pause in the movement of the shaft and sheetholdingarms. The adjustable gage-wires d d serve to determine the position ofthe sheet upon the fingers, and to prevent end movement to the sheet; asthe fingers are drawn back to drop the sheet. These fingers may be drawnback by any convenient means. I prefer and use the devices shown, whichconsist of the leversff, pivoted at 4, and connected by the links 9 g tothe lever h. (Shown by dotted lines in Fig. 1.) The spring 7a serves tokeep the fin gersin their position to receive the folded sheet, and thelatch-rod Z passing to the pivoted cam-plate m, serves to withdraw thefingers by one of the arms 6' as it rises, coming against the inclinedlower end of the cam-plate and moving it and the latch-rod and fingers,and dropping the sheet, as aforesaid, over the sheet-holding arm in themanner indicated in Fig. 3. The parts would return to their normalposition as the arm 6 again descended; but to return the fingersinstantly to position after the sheet has dropped I employ the lifter 0upon the arm 6', that comes up below the end of the latch-rod l in themanner indicated in Fig. 2, and lifts the same from-its notch at the endof a slot in the cam-plate m, allowing the latch-rod to slide backinstantly by the action of the spring k, and restore the parts to theirproper positions for the next sheet to be placed 0 on the fingers.Thelatch-plate mis to be swung back to place by a spring, a, as the arm6 descends, and the latch-rod drops into its notch ready for the nextoperation.

In folding printed sheets it is usual to allow 5 the edges of the sheetthat are not folded'to project slightly beyond the folded edge, asindicated in Fig. 3. I avail of this to aid the operator in opening thesheet before droppingit over the fingers, and for this purpose I place[00 one or more-stationary lips, t, at the edge of the feeding-table,soas to arresttheloose edges 8 of the folded sheet a and allow the foldededges 12 to pass out beyond the lip, as indicated in Fig. 3. Hence theoperator easily raises the part 8 over the lip and drops the sheet u onthe for book-sewing machines, of the fingers c c, gages d d, leversffandh, links 9 9, spring k, cam-plate m, latch-bar l, and litter,substantially as set forth.

4. The method herein specified of partially opening the folded sheets orsignatures in a book-sewing machine, consisting in placing the saidfolded sheets upon a table with the back folds upwardly, and moving suchsheets along to a lip upon the table, which is ofa height to arrest onepart of the end signature and allow the other part of such signature topass over the same and partially open the sheet, SllbSilElll tially asset forth.

Signed by me this 7th day of April, A. D. 1881.

DAVID MCOONNEL SMYTH.

Witnesses:

GEO. T. PINGKNEY, (JJIAs. H. SMITH.

